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DSP56857 bảng dữ liệu(PDF) 482 Page - Freescale Semiconductor, Inc

tên linh kiện DSP56857
Giải thích chi tiết về linh kiện  Digitial Signal Controller
PDF  662 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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DSP56857 bảng dữ liệu(HTML) 482 Page - Freescale Semiconductor, Inc

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TAP Controller
5685X Digital Signal Controller User Manual, Rev. 4
17-20
Freescale Semiconductor
Figure 17-7. TAP Controller State Diagram
The TAP Controller will execute the last instruction decoded until a new instruction is entered at
the Update-IR state, or Test-Logic-Reset is entered.
There are two paths through the 16-state machine. The shift-IR-scan path captures and loads
JTAG instructions into the JTAGIR. The shift-DR-scan path captures and loads data into the
other JTAG registers. The TAP Controller executes the last instruction decoded until a new
instruction is entered at the update-IR state, or until the test-logic-reset state is entered. When
using the JTAG port to access EOnCE module registers, follow these four steps:
1. Enable the TLM by shifting the TLM_SEL instruction into the JTAGIR.
2. When selected, the TLM must enable the 56800E TAP by shifting in the appropriate value
into the TLM register.
3. When the 56800E TAP is selected, the EOnCE module is selected by shifting the
ENABLE_EOnCE instruction.
1
0
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00
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Capture-DR
Shift-DR
Exit1-DR
Pause-DR
Exit2-DR
Update-DR
Select-IR-Scan
Capture-IR
Shift-IR
Exit1-IR
Pause-IR
Exit2-IR
Update-IR
Select-DR-Scan
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D
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B
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A
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Test-Logic-Reset F
Run-Test/Idle C



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